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ST7M254-325-3 — PACKING ASSEMBLY

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

ST7M254-325-3: PACKING ASSEMBLY.

The PACKING ASSEMBLY is a the manufacturer industrial component. Key specifications include height: 0.416 INCHES NOMINAL IN, material: PLASTIC POLYTETRAFLUOROETHYLENE BOTTOM RING, joint_type: SCARF-PERIPHERAL BOTTOM RING, temp_rating: -65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF, inside_diameter: 1.472 INCHES NOMINAL IN, outside_diameter: 1.867 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5330-01-421-3393, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
ST7M254-325-3
NSN: 5330-01-421-3393
FSC: 5330 — Packing and Gasket Materials
CAGE: 76301 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
height0.416 INCHES NOMINAL IN
materialPLASTIC POLYTETRAFLUOROETHYLENE BOTTOM RING
joint_typeSCARF-PERIPHERAL BOTTOM RING
temp_rating-65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
inside_diameter1.472 INCHES NOMINAL IN
outside_diameter1.867 INCHES NOMINAL IN
end_item_identificationPACER DAWN
intermediate_ring_quantity1
cross-sectional_shape_styleSQUARE/RECTANGULAR TOP RING
material_document_and_classificationMIL-R-8791 MIL SPEC SINGLE MATERIAL RESPONSE BOTTOM RING
NSN5330-01-421-3393
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: ST7M254-325-3 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
TEMP RATING: -65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
•
INTERMEDIATE RING QUANTITY: 1
•
OUTSIDE DIAMETER: 1.867 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-R-8791 MIL SPEC SINGLE MATERIAL RESPONSE BOTTOM RING
•
CROSS-SECTIONAL SHAPE STYLE: SQUARE/RECTANGULAR BOTTOM RING
TECHNICAL CHARACTERISTICS
TEMP RATING-65.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF
INTERMEDIATE RING QUANTITY1
OUTSIDE DIAMETER1.867 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-R-8791 MIL SPEC SINGLE MATERIAL RESPONSE BOTTOM RING
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-R-8791 MIL SPEC SINGLE MATERIAL RESPONSE TOP RING
CROSS-SECTIONAL SHAPE STYLESQUARE/RECTANGULAR BOTTOM RING
CROSS-SECTIONAL SHAPE STYLESQUARE/RECTANGULAR TOP RING
CROSS-SECTIONAL SHAPE STYLETEE INTERMEDIATE RING
INSIDE DIAMETER1.472 INCHES NOMINAL IN
HEIGHT0.416 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5330 — Packing and Gasket Materials
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5330-00-000-0085 5330-00-000-0167 5330-00-000-5275 5330-00-001-1260 5330-00-001-1833 5330-00-001-1844 5330-00-001-1845 5330-00-001-1846
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is ST7M254-325-3?
ST7M254-325-3 is a PACKING ASSEMBLY.
What is the NSN for ST7M254-325-3?
ST7M254-325-3 is cataloged in the U.S. Government catalog under NSN 5330-01-421-3393. This indicates validated use in U.S. government and defense supply chains.
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